Watch my heated debate with Kennedy on the total failure of legalizing marijuana in Colorado and related issues on Fox Business. She asked how I can support gun rights but not legal drugs. Watch my answer in video:
As with any other intoxicating substance, people who truly want marijuana will get it, regardless of the prohibition.
The history of Prohibition in the US, especially prohibition of liquor and certain guns, not to mention the waste of lives and treasure that is the "War on Drugs", can be referenced to show that the methods used to enforce any prohibition will be used to take other freedoms. The present rampant and unconstitutional takings by government--asset forfeiture-- is a direct result of the War on Drugs. And that is only one example.
Thought it seems counter-intuitive, after the "newness" wears off, we will arrive at the place we are with booze: some people don't drink, others only drink a little and never get drunk (Ol' Backwoods is in this category), and others are addicts, drinking themselves to death. So it will be with naturally-grown drugs like marijuana.
I have no interest in marijuana, but I do have an interest in not perpetuating what the Founders most feared: a standing army. And that is exactly what is required to enforce the prohibition of any controlled substance.
What about heroin? Cocaine? Synthetic pot (THC)? I don't know about these. But drawing a parallel with ethanol-based drinks, any American can make pretty much all the beer he or she and their friends can drink, but distilling ethanol into a concentrated form is heavily taxed and strictly proscribed in law. So, perhaps natural opium, coca, and hemp should not be proscribed by law, but only their concentration into truly dangerous drugs, along with the chemical synthesis of drugs such as methamphetamine.
We sure have to do something better than the present "War on Drugs". If it weren't for Americans who bear arms, I am convinced that the standing army so produced would have been used to create an utterly totalitarian society by now.